US941327A - Automatic knob-operated door-lock. - Google Patents

Description

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APPLICATION FILED NOV. 17, 1908 Patented Nov.23, 1909.

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G.KG. MANNING. AUTOMATIC KNOB OPERATBD DOOR LOOK. APPLICATION FILED NOV. 17. 1908.

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GUY C. MANNING, OF PORTLAND, OREGON.

AUTOMATIC KNOB-OPERATED DOOR-LOCK.

To all whom it may concern:

Be it known that I, GUY C. MANNING, of Portland, in the county of Multnomah, and in the State of Oregon, have invented certain new and useful Improvements in Automatic Knob-Operated Door-Locks, and do hereby declare that the following is a full, clear, and exact description thereof.

The object of my invention is to provide a door lock capable of being dead locked by manipulation or operation of the inside knob to the end that a key may be dispensed with and the lock structure otherwise simplified, and to attain this object by mechanism of simple construction so that its cost of manufacture may not be great, and whose operation will be readily understood, and to these ends my invention consists in the door lock constructed substantially as hereinafter specified and claimed.

Referring to the accompanying drawings, Figure 1 is an elevation of a lock designed for outside doors viewed from the inside of the door with the cover plate of the casing removed. Fig. 2 a fragmentary view similar to Fig. 1, showing the parts when arranged for a left hand door. Fig. 3 a section on the line A-A of Fig. 1, looking to the right. Fig. 4 a section on the line A-A of Fig. 1, looking to the left. Figs. 5 and 6 are detail views in elevation of the operating dogs. Fig. 7 a view similar to Fig. 1, of a lock with the parts arranged so that they are normally in a door-locking position. Fig. 8 a view in side elevation of one of the operating dogs of the lock illustrated in Fig. 7; and Fig. 9 a detail view in end elevation of the locking pawl of the lock of Fig. 7.

In the embodiment of my invention illustrated in the drawings, the lock casing 10 is of ordinary construct-ion, as is the spring actuated latch bolt 11, it having at its inner end a washer or collar 12. Engaging the washer at one side thereof, is the upper end of a lever 13, which is fulcrumed at its lower end against a bearing lug 14, and said lever is normally pressed to and yieldingly held in the position shown in full lines in Fig. 1, by a spring 15, which bears upon an arm or extension 16 of the lever. The lever 13 eX- tends above and below the axis of the knob shank or bar which is made in two alining sections 17 and 18, which, respectively, eX-

Speccation of Letters Patent.

Application led November 17, 1908.

Patented Nov. 23, 1909. serial No. 463,062.

tend inside and outside the door and have on their outer ends the usual turning knobs (not shown). On the shank section 17 is secured a two-armed lever or dog, its two arms 19 and 20 being, respectively, below and above the knob shank, and on the shank section 18 is secured a two-armed lever or dog 21 whose arms 22 and 23 are above and below the shank, respectively, and one arm being provided with a square sided notch 24 adapted to be engaged by a tooth 25 of a pawl 26 that is pivoted intermediate its ends to a stud or pin 27, its other end being situated in position to be engaged by the arm 19 of the dog on the shank section 17 when the latter is moved 'in one direction, as hereinafter described. The pawl 26 is adapted to be moved in the opposite direction by the contact of the arm 20 with a tooth or projection 28 on its end contiguous to its locking tooth 25, and the pawl is yieldingly held in each of the two positions intol which it may be moved by means of a spring plate 29 that intermediate its ends engages a lug or offset at the mid-length of the pawl, the spring engaging the lug or ofl'set above or below, according to the position to which the pawl is swung.

The operation of the lock illustrated in Fig. 1, is as follows: When the shank section 17 (which is on the inside of the door) is turned in a clockwise direction, assuming the parts to be in the position illustrated in full lines in Fig. 1, the lower arm 19 of the dog on said shank section 17, will engage the lever 13 and swing it to the position shown in dotted lines in Fig. 1, and by the engagement of the lever and the bolt collar 12, will retract the bolt 11, and at the same time the upper arm 20 of said dog will engage the tooth 2S on the upper arm of the pawl 26 and rock said pawl from the position shown in full lines to that shown in dotted lines in Fig. 1, and disengage its tooth 25 from the locking notch 24 of the dog 21 on the shank section 18 which has the knob on the outside of the door, and the pawl 26 will be held in this position by the action of the spring 29. The inside knob being released, the bolt 11 will be thrown by its spring intolatching position, and the operating lever 13 will be returned to the position shown in Fig. 1 in full lines, but the pawl 26 being held in dogreleasing position, it will be seen that the bolt 11 may be thrown by turning the outside knob in either direction, for when turned in one direction its upper arm 23 will rock the lever 13 to throw the bolt, and when turned in the opposite direction, the lower arrn 22 will rock the lever 13 to throw the bolt. Should it be desired, however, after having opened the door from within in the manner I have just described, to make it impossible to throw the bolt by turning` the outside knob, it is necessary after having turned the inside knob in a clockwise direction to unlatch the door, to turn it in the opposite direction to cause the lower arm 19 ot' the dog of the inside shank section 17 to engage the lower end of the pawl 26 and rock it against the action of the spring plate 29 to cause the rengagement of the dog 25 at the upper end ot' the pawl 26 with the locking notch 24 of the outside shank section dog 23. It is preferable not to have the upper arm 20 ot' the shank section dog act on Athe lever 13 to throw the bolt 11, and to prevent this, the swing of the pawl 26 is limited so that said pawl constitutes a stop which is engaged by the lower arm 19 ata point before the upper arm 20 can act on the lever 13. Thus the danger of unintentional setting of the door lock so that it cannot be manipulated by the outside knob is prevented. The parts are arranged in Fig. 1 for a right hand lock. To use the same mechanism for a left hand lock, it is necessary merely to reverse the position of the outside shank section dog 21, and the pawl 26 as illustrated in Fig. 2.

Vhen it is desired to have the lock so constructed and arranged that whenever the door is to be opened from the inside it will be locked against opening from the outside, the outside shank section dog is reversed as 'shown in Fig. 8, so that the locking notch is in its lower arm, and the locking pawl 2G is likewise reversed, so that whenever the inside knob is turned to throw the bolt, the pawl 26 will be moved into position to lock the dog of the outside shank section. In this case, the lock may be placed in a condition which will permit throwing of the bolt 11 from the outside by turning the inside shank section dog to cause its lower arm to engage the lower end of the pawl 2G and swing the latter into dog-releasing position, as illustrated in dotted lines in Fig. 7. As in the case of the lock illustrated in Fig. 1, that illustrated in Fig. 7 can be made either operative for left or right hand doors by giving the locking pawl and its dog the position required.

It will be understood that in the use of a lock embodying my invention in a door for use in bedrooms, the shank section 17 will be placed inside the room.

It will be seen that my lock wholly dispenses with the push rods or levers that are employed in locks intended to have the same capability of operation as mine, which gives the double advantage of simplication and cheapening of construction, and greater convenience in operation, and while a key will be provided in the case of locks for outer doors, none is necessary in the case of an inner door, such as that of a bedroom.

Having thus described my invention, what I claim isn 1. In a lock, the combination of the bolt, a

knob shank composed of independently movable sections, a bolt operating device for each shank section, and a latch for one of the shank sections operable by the other.

- 2. In a lock, the combination of the bolt, a knob shank composed of independently movable sections, a bolt operating device for each shank section, a latch for one of the shank sections operable by the other, said latch being movable into either of two positions and means on the latch-operating section alternately acting on the latch by the reverse rotation of said section to move the latch into one or the other of its said two positions.

3. In a lock, the combination of a bolt, a knob shank composed of independently movable sections, a two-armed lever on one of the sections having a locking notch, a pawl movable into and out of engagement with said locking notch, and means on the other section adapted to engage said pawl to move it either into or out otl engagement with said locking notch.

4. In a lock, the combination of the bolt, a knob shank composed of independently movable sections, a bolt operating device .for each shank section, a latch for one of the shank sections operable by the other, said latch being movable into either of two positions, and means to yieldingly hold it in cach of said positions.

5. In a lock, the combination of the bolt, a knob shank composed of independently movable sections, a two armed boltoperating device or each shank section, a pawl adapted for latching engagement with one arm of one of said devices and operable by `both arms of the other device.

G. In a lock, the combination of the spring actuated latch bolt, a lever engaging the same, a knob shank composed of alining independently operable sections, a two-armed lever-engaging device on each shank section, one arm of one of said devices being notched, a pawl pivoted intermediate its ends having a tooth to engage said notch, and adapted to be engaged and moved by both the arms of the other shank section device.

7. In a lock, the combination of the spring actuated latch bolt, a lever engaging the saine, a knob shank composed of alining vice, and a spring acting on said pawl to independently operable sections, :L tWohold it in eitherl of two positions. 10 armed lever-engaging device on each shank In testimony that I claim the foregoing I section, one arm of one of said devices being have hereunto set my hand.

notched, a paWl pivoted intermediate its GUY C. MANNING.

ends having a tooth to engage said notch, Vitnesses:

and adapted to be engaged and moved by F. J. GLovER,

both the arnis of the other shank section de- LESTER L. CURL.

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